package com.testingedu.action.background;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.imageio.ImageIO;

public class AdminAction extends RequestContext{

	private static final long serialVersionUID = 8460834888428705377L;
	//定义图形验证码中绘制字符的字体
	private final Font mFont = new Font("Arial Black", Font.PLAIN, 16);
	
	//定义图形验证码的大小
	private final int IMG_WIDTH = 100;
	private final int IMG_HEIGTH = 18;
	private static final List<String> frameUrlList = new ArrayList<String>();
	static {
		frameUrlList.add("top");
		frameUrlList.add("center");
		frameUrlList.add("down");
		frameUrlList.add("left");
		frameUrlList.add("right");
		frameUrlList.add("main");
	}
	public void _login() throws Exception {
		request.getRequestDispatcher("/WEB-INF/admin/jsp/login.jsp").forward(request, response);
	}
	
	public void _isLogin() throws Exception {
		if(getTUser() == null) {
			response.getWriter().write("{\"login\":0}");
		} else {
			response.getWriter().write("{\"login\":1}");
		}
		response.getWriter().close();
	}
	
	public void _forward() throws Exception{
		String goToUrl = request.getParameter("target");
		boolean inMyUrl = false;
		for (String target : frameUrlList) {
			if(target.equals(goToUrl)) {
				inMyUrl = true;
			}
		}
		if(inMyUrl) {
			request.getRequestDispatcher("/WEB-INF/admin/jsp/"+goToUrl+".jsp").forward(request,response);
		} else {
			request.getRequestDispatcher("/testingedu/index.jsp").forward(request,response);
		}
	}
	
	public void _yzmImg() throws Exception {
		BufferedImage image = new BufferedImage(IMG_WIDTH , IMG_HEIGTH , BufferedImage.TYPE_INT_RGB);
		Graphics g = image.getGraphics();
		Random random = new Random();
		g.setColor(getRandColor(200 , 250));
		//填充背景色
		g.fillRect(1, 1, IMG_WIDTH - 1, IMG_HEIGTH - 1);
		//为图形验证码绘制边框
		g.setColor(new Color(102 , 102 , 102));
		g.drawRect(0, 0, IMG_WIDTH - 1, IMG_HEIGTH - 1);
		g.setColor(getRandColor(160,200));
		//生成随机干扰线
		for (int i = 0 ; i < 80 ; i++)
		{
			int x = random.nextInt(IMG_WIDTH - 1);
			int y = random.nextInt(IMG_HEIGTH - 1);
			int xl = random.nextInt(6) + 1;
			int yl = random.nextInt(12) + 1;
			g.drawLine(x , y , x + xl , y + yl);
		}
		g.setColor(getRandColor(160,200));
		//生成随机干扰线
		for (int i = 0 ; i < 80 ; i++)
		{
			int x = random.nextInt(IMG_WIDTH - 1);
			int y = random.nextInt(IMG_HEIGTH - 1);
			int xl = random.nextInt(12) + 1;
			int yl = random.nextInt(6) + 1;
			g.drawLine(x , y , x - xl , y - yl);
		}
		//设置绘制字符的字体
		g.setFont(mFont);
		//用于保存系统生成的随机字符串
		String sRand = "";
		for (int i = 0 ; i < 4 ; i++)
		{
			String tmp = getRandomChar();
			sRand += tmp;
			//获取随机颜色
			g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
			//在图片上绘制系统生成的随机字符
			g.drawString(tmp , 15 * i + 20, 15);
		}
		//获取HttpSesssion对象
		//HttpSession session = request.getSession();
		//将随机字符串放入HttpSesssion对象中 
		//session.removeAttribute("rand");
		request.getSession().setAttribute("yanZhengMaKey", sRand.toLowerCase());
		//session.setAttribute("yanZhengMaKey" , sRand.toLowerCase());
		g.dispose();
		ImageIO.write(image, "JPEG", response.getOutputStream());
	}
	
	//定义一个获取随机颜色的方法
	private Color getRandColor(int fc, int bc){
		Random random = new Random();
		if(fc > 255) fc = 255;
		if(bc > 255) bc=255;
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		//得到随机颜色
		return new Color(r , g , b);
	}
	
	//定义获取随机字符串方法
	private String getRandomChar(){
		/*
		//生成一个0、1、2的随机数字
		int rand = (int)Math.round(Math.random() * 2);
		long itmp = 0;
		char ctmp = '\u0000';
		switch (rand){
			case 1://生成大写字母
				itmp = Math.round(Math.random() * 25 + 65);
				ctmp = (char)itmp;
				return String.valueOf(ctmp);
			case 2://生成小写字母
				itmp = Math.round(Math.random() * 25 + 97);
				ctmp = (char)itmp;
				return String.valueOf(ctmp);
			default ://生成数字
				itmp = Math.round(Math.random() * 9);
				return  itmp + "";
		}*/
		long itmp = Math.round(Math.random() * 9);
		return  itmp + "";
	}
}
